Question

The sum of the interior angle measures of a convex polygon is 1620° . how many sides does it have?the sum of the interior angle measures of a convex polygon is 1620° . how many sides does it have?

Answer 1

If you are given a convex polygon with $n$ sides and $S$ is the sum of the measures of the interior angles then $S = 180(n - 2)$.

So, $1,620 = 180(n-2)$.
$n-2=9$
$n=11$

The polygon has 11 sides.

Answer 2

No. of sides 
=1620/180+2
=11